With a 4-cycle engine, the Ryobi 18 in. 30 cc Gas Trimmer offers the convenience of not having to mix gas or oil for start-up. The trimmer provides powerful operation in a lightweight, low-emission, anti-vibration and low-noise design. The trimmer shaft offers an optimal reach and helps you trim under obstacles. Ryobi 4-cycle trimmers are the lightest 4-cycle trimmers on the market and come with a best-in-class, three-year warranty.